casinf(3) Linux Man Page - System Grab Bag

Name

casin, casinf, casinl - complex arc sine

Library

Math library ( libm ", " -lm )

Synopsis

#include <complex.h> 
double complex casin(double complex  z );
float complex casinf(float complex  z );
long double complex casinl(long double complex  z );

Description

These functions calculate the complex arc sine of z. If y\ =\ casin(z), then z\ =\ csin(y). The real part of y is chosen in the interval [-pi/2,pi/2].

One has:

    casin(z) = -i clog(iz + csqrt(1 - z * z))

Attributes

For an explanation of the terms used in this section, see attributes(7). allbox; lbx lb lb T{ casin()casinf()casinl()

Interface	Attribute	Value
T}	Thread safety	MT-Safe

Standards

C11, POSIX.1-2008.

History

glibc 2.1. C99, POSIX.1-2001.